104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/*##############################################################################
|
|
## Author: Shaun Reed ##
|
|
## Legal: All Content (c) 2022 Shaun Reed, all rights reserved ##
|
|
## About: Skybox class using QtOpenGL ##
|
|
## ##
|
|
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
|
|
##############################################################################*/
|
|
|
|
#include <abstractscene.h>
|
|
#include <skybox.h>
|
|
#include <texture.h>
|
|
|
|
using namespace Qtk;
|
|
|
|
Skybox::Skybox(std::string right, std::string top, std::string front,
|
|
std::string left, std::string bottom, std::string back,
|
|
const std::string & name)
|
|
: mVBO(QOpenGLBuffer::VertexBuffer),
|
|
mVertices(Cube(QTK_DRAW_ELEMENTS).vertices()),
|
|
mIndices(Cube(QTK_DRAW_ELEMENTS).indices())
|
|
{
|
|
init();
|
|
mCubeMap = Texture::initCubeMap(
|
|
QImage(right.c_str()).mirrored(), QImage(top.c_str()),
|
|
QImage(front.c_str()), QImage(left.c_str()),
|
|
QImage(bottom.c_str()), QImage(back.c_str()));
|
|
}
|
|
|
|
Skybox::Skybox(std::string name)
|
|
: Skybox(":/right.png", ":/top.png", ":/front.png",
|
|
":/left.png", ":/bottom.png", ":/back.png",
|
|
name)
|
|
{}
|
|
|
|
Skybox::Skybox(QOpenGLTexture * cubeMap, const std::string & name)
|
|
: mCubeMap(cubeMap) { init();}
|
|
|
|
|
|
/*******************************************************************************
|
|
* Public Member Functions
|
|
******************************************************************************/
|
|
|
|
void Skybox::draw()
|
|
{
|
|
glDepthFunc(GL_LEQUAL);
|
|
glDepthMask(GL_FALSE);
|
|
|
|
mVAO.bind();
|
|
mProgram.bind();
|
|
mCubeMap->bind();
|
|
|
|
mProgram.setUniformValue("uProjectionMatrix", Scene::Projection());
|
|
mProgram.setUniformValue("uViewMatrix", Scene::Camera().toMatrix());
|
|
mProgram.setUniformValue("uTexture", 0);
|
|
glDrawElements(GL_TRIANGLES, mIndices.size(),
|
|
GL_UNSIGNED_INT, mIndices.data());
|
|
|
|
mCubeMap->release();
|
|
mProgram.release();
|
|
mVAO.release();
|
|
|
|
glDepthFunc(GL_LESS);
|
|
glDepthMask(GL_TRUE);
|
|
glActiveTexture(GL_TEXTURE0);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
* Private Member Functions
|
|
******************************************************************************/
|
|
|
|
void Skybox::init()
|
|
{
|
|
initializeOpenGLFunctions();
|
|
|
|
// Set up shader program
|
|
mProgram.create();
|
|
mProgram.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/skybox.vert");
|
|
mProgram.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/skybox.frag");
|
|
mProgram.link();
|
|
mProgram.bind();
|
|
|
|
// Setup VAO
|
|
mVAO.create();
|
|
mVAO.bind();
|
|
|
|
// Setup VBO for vertex position data
|
|
mVBO.create();
|
|
mVBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
|
|
mVBO.bind();
|
|
// Allocate vertex positions into VBO
|
|
mVBO.allocate(mVertices.data(), mVertices.size() * sizeof(mVertices[0]));
|
|
|
|
// Enable attribute array for vertex positions
|
|
mProgram.enableAttributeArray(0);
|
|
mProgram.setAttributeBuffer(0, GL_FLOAT, 0, 3, sizeof(QVector3D));
|
|
// Set shader texture unit to 0
|
|
mProgram.setUniformValue("uTexture", 0);
|
|
|
|
mVAO.release();
|
|
mVBO.release();
|
|
mProgram.release();
|
|
}
|